Diceware Password Generator by ChatGPT

main.go

package main

import (
	"bufio"
	"flag"
	"fmt"
	"log"
	"math/rand"
	"os"
	"strings"
	"time"
)

var dicewareList []string
var separatorChars = []rune("0123456789!@.-_*")

func main() {
	rand.Seed(time.Now().UnixNano())

	filename := flag.String("file", "diceware_nl.txt", "Bestandsnaam van de diceware woordenlijst")
	length := flag.Int("length", 5, "Aantal woorden in het gegenereerde wachtwoord")
	flag.Parse()

	err := loadDicewareList(*filename)
	if err != nil {
		log.Fatalf("Fout bij het laden van diceware woordenlijst: %v", err)
	}

	password := generatePassword(*length)
	fmt.Println(password)
}

func loadDicewareList(filename string) error {
	file, err := os.Open(filename)
	if err != nil {
		return err
	}
	defer file.Close()

	scanner := bufio.NewScanner(file)
	for scanner.Scan() {
		dicewareList = append(dicewareList, scanner.Text())
	}

	if err := scanner.Err(); err != nil {
		return err
	}

	return nil
}

func generatePassword(length int) string {
	var passwordParts []string
	uppercaseIndex := rand.Intn(length)

	for i := 0; i < length; i++ {
		word := dicewareList[rand.Intn(len(dicewareList))]
		if i == uppercaseIndex {
			word = strings.ToUpper(word)
		}

		passwordParts = append(passwordParts, word)

		if i < length-1 {
			separator := string(separatorChars[rand.Intn(len(separatorChars))])
			passwordParts = append(passwordParts, separator)
		}
	}

	return strings.Join(passwordParts, "")
}